hearing gunfire and screaming, the 6-year-old girl was left with emotional scars. 20 children and six educators were killed in the shooting. and crowds lined up for the gun show in dulles, virginia, this weekend. in the wake of the sandy hook school shootings and push for gun control, many said they wanted to buy assault rifles and high capacity magazines before a possible ban. >> say something should happen and we no longer have the right to purchase our guns, that means somebody actually got off their butt and decided we're going to change the constitution and that starts the ball rolling on other things and opens the door to other issues. >> the f.b.i. reported a record 16.8 million background checks for guns this year. prosecutors in new york city say the second subway murder this month was a hate crime. police arrested and charged 31-year-old erica menendez in that case on saturday, accused of pushing sunando sen to his death in front of a seven-car train at a station in queens on thursday. the d.a. says she told authorities she has hated muslims since 9/11 and thought the victim was musli